备注是一种特殊的幻灯片，它可以被添加到演示幻灯片以提供提示信息给演讲者。在放映PowerPoint文档时开启演示者视图，演讲者就可以看到幻灯片的内容和备注，而观众则仅能看到幻灯片的内容。

本文将介绍如何使用Spire.Presentation添加备注到PowerPoint文档以及获取现有PowerPoint文档中的备注。

添加备注

//新建PowerPoint文档
Presentation ppt = new Presentation();
//获取第一张幻灯片
ISlide slide = ppt.Slides[0];

//添加备注幻灯片到第一张幻灯片
NotesSlide notesSlide = slide.AddNotesSlide();

TextParagraph paragraph = new TextParagraph();
paragraph.Text = "备注： ";
notesSlide.NotesTextFrame.Paragraphs.Append(paragraph);

//添加第一条备注
paragraph = new TextParagraph();
paragraph.Text = "这是我的第一条备注；";
notesSlide.NotesTextFrame.Paragraphs.Append(paragraph);
notesSlide.NotesTextFrame.Paragraphs[1].BulletType = TextBulletType.Numbered;
notesSlide.NotesTextFrame.Paragraphs[1].BulletStyle = NumberedBulletStyle.BulletArabicPeriod;

//添加第二条备注
paragraph = new TextParagraph();
paragraph.Text = "这是我的第二条备注；";
notesSlide.NotesTextFrame.Paragraphs.Append(paragraph);
notesSlide.NotesTextFrame.Paragraphs[2].BulletType = TextBulletType.Numbered;
notesSlide.NotesTextFrame.Paragraphs[2].BulletStyle = NumberedBulletStyle.BulletArabicPeriod;

//添加第三条备注
paragraph = new TextParagraph();
paragraph.Text = "这是我的第三条备注；";
notesSlide.NotesTextFrame.Paragraphs.Append(paragraph);
notesSlide.NotesTextFrame.Paragraphs[3].BulletType = TextBulletType.Numbered;
notesSlide.NotesTextFrame.Paragraphs[3].BulletStyle = NumberedBulletStyle.BulletArabicPeriod;

//保存文档
ppt.SaveToFile("Notes.pptx", FileFormat.Pptx2013);

'新建PowerPoint文档
Dim ppt As New Presentation()
'获取第一张幻灯片
Dim slide As ISlide = ppt.Slides(0)

'添加备注幻灯片到第一张幻灯片
Dim notesSlide As NotesSlide = slide.AddNotesSlide()

Dim paragraph As New TextParagraph()
paragraph.Text = "备注： "
notesSlide.NotesTextFrame.Paragraphs.Append(paragraph)

'添加第一条备注
paragraph = New TextParagraph()
paragraph.Text = "这是我的第一条备注；"
notesSlide.NotesTextFrame.Paragraphs.Append(paragraph)
notesSlide.NotesTextFrame.Paragraphs(1).BulletType = TextBulletType.Numbered
notesSlide.NotesTextFrame.Paragraphs(1).BulletStyle = NumberedBulletStyle.BulletArabicPeriod

'添加第二条备注
paragraph = New TextParagraph()
paragraph.Text = "这是我的第二条备注；"
notesSlide.NotesTextFrame.Paragraphs.Append(paragraph)
notesSlide.NotesTextFrame.Paragraphs(2).BulletType = TextBulletType.Numbered
notesSlide.NotesTextFrame.Paragraphs(2).BulletStyle = NumberedBulletStyle.BulletArabicPeriod

'添加第三条备注
paragraph = New TextParagraph()
paragraph.Text = "这是我的第三条备注；"
notesSlide.NotesTextFrame.Paragraphs.Append(paragraph)
notesSlide.NotesTextFrame.Paragraphs(3).BulletType = TextBulletType.Numbered
notesSlide.NotesTextFrame.Paragraphs(3).BulletStyle = NumberedBulletStyle.BulletArabicPeriod

'保存文档
ppt.SaveToFile("Notes.pptx", FileFormat.Pptx2013)

获取备注

//加载PowerPoint文档
Presentation ppt = new Presentation();
ppt.LoadFromFile("Notes.pptx");

//获取第一张幻灯片
ISlide slide = ppt.Slides[0];

//获取第一张幻灯片的备注幻灯片
NotesSlide notesSlide = slide.NotesSlide;

//遍历备注幻灯片中的所有段落
foreach (TextParagraph paragraph in notesSlide.NotesTextFrame.Paragraphs)
{
    //获取段落文本
    string notes = paragraph.Text;
    Console.WriteLine(notes);
}

'加载PowerPoint文档
Dim ppt As New Presentation()
ppt.LoadFromFile("Notes.pptx")

'获取第一张幻灯片
Dim slide As ISlide = ppt.Slides(0)

'获取第一张幻灯片的备注幻灯片
Dim notesSlide As NotesSlide = slide.NotesSlide

'遍历备注幻灯片中的所有段落
For Each paragraph As TextParagraph In notesSlide.NotesTextFrame.Paragraphs
	'获取段落文本
	Dim notes As String = paragraph.Text
	Console.WriteLine(notes)
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